Improve README

[samumbach]

Great, simple project! Looking forward to using this -- I'd settled on aero for Clojure configs, but the Docker secrets support in dyn-edn is a real selling point 😀 👍

Thanks!

[samumbach]

Thanks, @hlship 😁

I have a couple other changes in the works; I'll open PRs for these over the next few days:

• Add a test demonstrating the relative priority of the property sources (I think Docker secrets may take precedence over environment variables, which is counter to the statement in the README).
• Rename test namespaces to have -test suffix (to make it easier to run them with cognitect-labs and kaocha test runners).
  • See Run tests with GitHub Actions #8
• Update implementation so tests pass when temp directory path includes a symlink (this is the default on macOS).
• (Maybe) Add GitHub Actions for automated tests.
  • See Run tests with GitHub Actions #8

Please let me know if you have any immediate thoughts on these topics -- if any of these are unlikely to be merged, I'll be sure to focus my efforts on the others first.